PDF malware analysis — malicious · e385ddb1de36a544

MALICIOUS

PDF

12.7 KB

MD5: 34a29e492c7c70bde5017324acab6247 SHA-1: 66f71a0ff157ecb3ce96911b83b2226a8dbd1515 SHA-256: e385ddb1de36a544baf45e8a2a83ec657b59973a2dd71bc43be8112c173cfce1

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics as a stager for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be downloading and executing a secondary payload, as suggested by the 'Dropped' classification in ClamAV.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `80a1db2e6fc5ad490f96ca1639503ccb6365a9db482ce7b9cdacaedd5a16eaa8`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3087	331 bytes

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